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Forum Discussion
massive DNS TXT queries for cisco.com RAXE290
Have a nighthwak RAXE290 with a Pi-hole attached. Had my Pihole address put in for the DNS. Had pihole do DHCP and the box on the router was unchecked. Setup worked for years. All the sudden lately g...
so from reading what you just wrote, you have the Pihole managing dhcp and the router handling DNS.
that really ruins the point of pihole. Or I'm reading that wrong.
What modem/gateway is the router connected to?
Anything hardwired that can be sending the requests?
"so from reading what you just wrote, you have the Pihole managing dhcp and the router handling DNS." correct(ish) according to this doc on the pihole-discourse, as long as the pihole is handling the DHCP it'll function correctly. Going through my queries I can attest that it seems to be working just fine. I used to be under the assumption that I needed to have the router pointed to my pihole DNS but that doesn't seem to be the case. I stumbled on this by accident as I was messing with the settings trying to narrow the problem and all the sudden it was working but I couldn't figure out why and thought it was a glitch. But going through the docs it turns out that it's not a glitch.
I have astound(rcn) fiber, I am not sure on the make or model of the modem but it's small. There doesn't seem to be a way to go into the settings on it, it seems to just pass everything directly to the netgear. The only thing hardwired into the router is my raspberry pi. I have pihole installed on it and Nextcloud. Neither should be making requests and even if they were it would show up as the pihole IP and not the router IP.
I used to have a previous netgear router and used the old settings and it worked just fine. My brother is currently using my old router with a different ISP using the old settings and he hasn't had any issues.
Good to hear its still working fine with that setup.
I'd be looking at programs on a pc/laptop that might be running rogue or sending requests. I was in a beta test that overwhelmed my pihole the one time.
will do. again it was weird because all the request came from 10.0.0.1 which is my router gateway. all them were TXT queries and all came back NODATA. it was requesting about 5000/5000 each for adobe/cisco every 10 minutes nonstop. if i put the rate limiter on it would stop the queries but under "requests" it would go up to the millions for that one device. the pihole.log would get so big it would take up the entire sd card (22GB) until there was no more room and then lock up the pi until i could delete it.